Finding the Fourth Proportional to 55,431.56, 76,495.78 and 30,281

Step by Step Solution

1. Step 1: Write the proportion equation
   55,431.56 : 76,495.78 = 30,281 : x
2. Step 2: Convert to fraction form
   55,431.56/76,495.78 = 30,281/x
3. Step 3: Cross multiply
   55,431.56x = 76,495.78 × 30,281
4. Step 4: Simplify right side
   55,431.56x = 2,316,368,714.18
5. Step 5: Solve for x
   x = 2,316,368,714.18/55,431.56
6. Step 6: Final answer
   x = 41,787.90